Highly Efficient Deep-Blue Phosphorescent Organic Light-Emitting Diodes Using Iridium(III) Bis[(5-cyano-4-fluorophenyl)pyridinato-N,C2']picolinate as an Emitter

The authors have demonstrated highly efficient deep-blue phosphorescent organic light-emitting diodes (BPHOLEDs) using iridium(III) bis[(5-cyano-4-fluorophenyl)pyridinato-N,C2']picolinate (FCNIrpic) as a blue emitter. FCNIrpic has a deeper-blue color than iridium(III) bis[4,6-(difluorophenyl)pyridinato-N,C2']picolinate. The BPHOLEDs with FCNIrpic showed a maximum luminous efficiency of 19.00 cd/A, a maximum external quantum efficiency of 10.70%, and Commission Internationale de L'Eclairage coordinates (CIEx,y) of (0.16,0.26).